Week 1 - Friday Exercise

Create a new Project

• Create a new maven project in IntelliJ IDEA.
• Add the following dependencies to the pom.xml file:

<dependencies>
    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-api</artifactId>
        <version>5.9.0</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-engine</artifactId>
        <version>5.9.0</version>
        <scope>test</scope>
    </dependency>

• Create a new package called tdd and a new class called Calculator.
• Create a new junit 5 test class called CalculatorTest.

Calculator

• Using TDD (Write the test first, then implement each method) create a simple calculator class with the following methods:
  • add(int a, int b)
  • subtract(int a, int b)
  • multiply(int a, int b)
  • divide(int a, int b)

Git

• Create a new repository on GitHub called tdd-calculator.
• Add the project to the repository.
• Commit and push your changes to GitHub.
• Pull the changes from GitHub to your computer.
• Add a README.md file to the project.
• Add and commit
• Create a new branch called featureAddString and make changes to the add method.

Calculator 2

• Add a new test for the add method that can take a String as input and return the sum of the numbers in the String.
  • Example: add("1,2,3") should return 6.
  • Overload the add method to take a String as input.
• Add a new test for the add method that can take an array of numbers as input and return the sum of the numbers in the array.
  • Example: add(new int[]{1,2,3}) should return 6.
  • Overload the add method to take an array of numbers as input.
  • Make a description of the program and its features in the README.md file.

Git 2

• Run git status to check the status of your repository before adding and committing changes.
• Add and commit your changes to the featureAddString branch. Make sure to write a good commit message.
• Merge the featureAddString branch into master.
• Run git log to explore the commit history. Identify the commit hashes, authors, and commit messages.
• Run git push to push your changes to GitHub.
• Add the git status and log messages to the README.md file and commit
• Create a gitignore file and add the target folder and the .idea folder to it.
• Make sure the remote repository is free of the target and .idea folders.